Medulla (hair)

Medulla (hair)

The medulla is the inner most layer of the hair shaft.[1]

Importance in forensics

Hair can easily be discredited as belonging to a human with the presence of medulla. Most other mammals possess one which is easily visible under a microscope. Humans of Middle-Eastern origin, however, do, in fact, possess a thin, less visible medulla. The medulla cannot be used to define species, only to distinguish animal hairs from human hairs with a similar appearance ie: ferrets and koalas to name two examples.


References

  1. ^ James, William; Berger, Timothy; Elston, Dirk (2005) Andgoogrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. Page 8. ISBN 0-7216-2921-0.


v · d · eIntegumentary system (TA A16, TH H3.12, GA 10.1062)
Skin
Basal keratinocyte · Lamina lucida · Lamina densa
Skin fields
Head
campus frontalis, campus parietalis, campus occipitalis, campus temroralis, campus facialis (campus orbitalis, campus nasalis, campus oralis, campus mentalis, campus infraorbitalis, campus buccalis, campus zygomaticus)
Neck
campus cervicalis anterior (campus submandibularis, campus caroticus, campus omotrachealis, campus submentalis), campus sternocleidomastoideus, campus cervicalis posterior (campus omoclavicularis), campus nuchalis
Chest
campus presternalis, campus clavipectoralis, campus pectoralis verus, campus mammarius, campus inframammarius, campus axillaris
Abdomen
campus hypochondriacus, campus epigastricus, campus abdominalis lateralis, campus umbilicalis, campus inguinalis, campus hypogastricus
Perineum
campus analis, campus urogenitalis
Subcutaneous tissue
Panniculus/Pannus (Panniculus adiposus · Panniculus carnosus) · Stratum membranosum · Loose connective tissue · Superficial fascia
Adnexa
Skin glands

Sweat glands: Apocrine sweat gland · Eccrine sweat gland

Sebaceous
Hair shaft
Arrector pili muscle
Pilosebaceous unit
Nail matrix · Nail plate (Lunula)  · Eponychium · Paronychium · Hyponychium

M: INT, SF, LCT

anat/phys/devp

noco(i/b/d/q/u/r/p/m/k/v/f)/cong/tumr(n/e/d), sysi/epon

proc, drug (D2/3/4/5/8/11)

M: SKA

anat/phys/devp

noco/cong/tumr, sysi/epon

proc, drug(D10)

Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Medulla — refers to the middle of something and derives from the Latin word for marrow. Its anatomical uses include: Medulla oblongata, a part of the brain stem Renal medulla, a part of the kidney Adrenal medulla, a part of the adrenal gland Medulla ossea …   Wikipedia

  • hair medulla — medulla of hair, medulla of hair shaft a tiny area of material in some hairs, running up the middle of the hair cortex …   Medical dictionary

  • Hair care — is an overall term for parts of hygiene and cosmetology involving the hair on the human head. Hair care will differ according to one s hair type and according to various processes that can be applied to hair. All hair is not the same; indeed,… …   Wikipedia

  • Hair — For other uses, see Hair (disambiguation). Hairy redirects here. For individuals nicknamed the Hairy , see List of people known as the Hairy. Hair Cross section of a hair Latin unguis …   Wikipedia

  • Medulla — The innermost part. The spinal medulla, for example, is that part of the spinal cord that is lodged within the vertebral canal. * * * Any soft marrow like structure, especially in the center of a part. SEE ALSO: m. oblongata. SYN: substantia… …   Medical dictionary

  • Hair follicle — A hair follicle is part of the skin that grows hair by packing old cells together. Attached to the follicle is a sebaceous gland, a tiny sebum producing gland found everywhere except on the palms, lips and soles of the feet. The thicker density… …   Wikipedia

  • hair — 1. One of the fine, keratinized filamentous epidermal growths arising from the skin of the body of mammals except the palms, soles, and flexor surfaces of the joints; the full length and texture of h. varies markedly in different body sites. SYN …   Medical dictionary

  • hair cortex — cortex of hair, cortex of hair shaft the middle layer of a hair, constituting the bulk of the hair substance, surrounded by the hair cuticle and often enclosing a small hair medulla …   Medical dictionary

  • hair — n. a threadlike keratinized outgrowth of the epidermis of the skin. It develops inside a tubular hair follicle. The part above the skin consists of three layers: an outer cuticle; a cortex, forming the bulk of the hair and containing the pigment… …   The new mediacal dictionary

  • medulla — n. 1 the inner region of certain organs or tissues usu. when it is distinguishable from the outer region or cortex, as in hair or a kidney. 2 the myelin layer of certain nerve fibres. 3 the soft internal tissue of plants. Phrases and idioms:… …   Useful english dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”